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/*############################################################################
# Copyright 1999-2018 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
############################################################################*/
/*
// Purpose:
// Intel(R) Integrated Performance Primitives
// Cryptographic Primitives
// Internal GF(p) basic Definitions & Function Prototypes
//
*/
#if !defined(_PCP_GFP_H_)
#define _PCP_GFP_H_
#include "owncp.h"
//#include "pcpbn.h"
#include "pcpgfpmethod.h"
#include "pcpmontgomery.h"
/* GF element */
typedef struct _cpGFpElement {
IppCtxId idCtx; /* GF() element ident */
int length; /* length of element (in BNU_CHUNK_T) */
BNU_CHUNK_T* pData;
} cpGFpElement;
#define GFPE_ID(pCtx) ((pCtx)->idCtx)
#define GFPE_ROOM(pCtx) ((pCtx)->length)
#define GFPE_DATA(pCtx) ((pCtx)->pData)
#define GFPE_TEST_ID(pCtx) (GFPE_ID((pCtx))==idCtxGFPE)
/* GF(p) context */
typedef struct _cpGFp {
IppCtxId idCtx; /* GFp spec ident */
gsModEngine* pGFE; /* arithmethic engine */
} cpGFp;
#define GFP_ALIGNMENT ((int)(sizeof(void*)))
/* Local definitions */
#define GFP_MAX_BITSIZE (IPP_MAX_GF_BITSIZE) /* max bitsize for GF element */
#define GFP_POOL_SIZE (16)//(IPP_MAX_EXPONENT_NUM+3) /* num of elements into the pool */
#define GFP_RAND_ADD_BITS (128) /* parameter of random element generation ?? == febits/2 */
#define GFP_ID(pCtx) ((pCtx)->idCtx)
#define GFP_PMA(pCtx) ((pCtx)->pGFE)
#define GFP_PARENT(pCtx) MOD_PARENT((pCtx))
#define GFP_EXTDEGREE(pCtx) MOD_EXTDEG((pCtx))
#define GFP_FEBITLEN(pCtx) MOD_BITSIZE((pCtx))
#define GFP_FELEN(pCtx) MOD_LEN((pCtx))
#define GFP_FELEN32(pCtx) MOD_LEN32((pCtx))
#define GFP_PELEN(pCtx) MOD_PELEN((pCtx))
#define GFP_METHOD(pCtx) MOD_METHOD((pCtx))
#define GFP_MODULUS(pCtx) MOD_MODULUS((pCtx))
#define GFP_MNT_FACTOR(pCtx) MOD_MNT_FACTOR((pCtx))
#define GFP_MNT_R(pCtx) MOD_MNT_R((pCtx))
#define GFP_MNT_RR(pCtx) MOD_MNT_R2((pCtx))
#define GFP_HMODULUS(pCtx) MOD_HMODULUS((pCtx))
#define GFP_QNR(pCtx) MOD_QNR((pCtx))
#define GFP_POOL(pCtx) MOD_POOL_BUF((pCtx))
#define GFP_MAXPOOL(pCtx) MOD_MAXPOOL((pCtx))
#define GFP_USEDPOOL(pCtx) MOD_USEDPOOL((pCtx))
#define GFP_IS_BASIC(pCtx) (GFP_PARENT((pCtx))==NULL)
#define GFP_TEST_ID(pCtx) (GFP_ID((pCtx))==idCtxGFP)
/*
// get/release n element from/to the pool
*/
#define cpGFpGetPool(n, gfe) gsModPoolAlloc((gfe), (n))
#define cpGFpReleasePool(n, gfe) gsModPoolFree((gfe), (n))
__INLINE int cpGFpElementLen(const BNU_CHUNK_T* pE, int nsE)
{
for(; nsE>1 && 0==pE[nsE-1]; nsE--) ;
return nsE;
}
__INLINE BNU_CHUNK_T* cpGFpElementCopy(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pE, int nsE)
{
int n;
for(n=0; n<nsE; n++) pR[n] = pE[n];
return pR;
}
__INLINE BNU_CHUNK_T* cpGFpElementPadd(BNU_CHUNK_T* pE, int nsE, BNU_CHUNK_T filler)
{
int n;
for(n=0; n<nsE; n++) pE[n] = filler;
return pE;
}
__INLINE BNU_CHUNK_T* cpGFpElementCopyPadd(BNU_CHUNK_T* pR, int nsR, const BNU_CHUNK_T* pE, int nsE)
{
int n;
for(n=0; n<nsE; n++) pR[n] = pE[n];
for(; n<nsR; n++) pR[n] = 0;
return pR;
}
__INLINE int cpGFpElementCmp(const BNU_CHUNK_T* pE, const BNU_CHUNK_T* pX, int nsE)
{
for(; nsE>1 && pE[nsE-1]==pX[nsE-1]; nsE--)
;
return pE[nsE-1]==pX[nsE-1]? 0 : pE[nsE-1]>pX[nsE-1]? 1:-1;
}
#define CP_CT_MSB(a) ((a)>>((sizeof((a))*8 -1)))
#define CP_CT_IS_ZERO(a) CP_CT_MSB(~(a) & ((a)-1))
__INLINE int cpGFpElementIsEquChunk(const BNU_CHUNK_T* pE, int nsE, BNU_CHUNK_T x)
{
int i;
BNU_CHUNK_T accum = pE[0] ^ x;
for (i = 1; i < nsE; i++) {
accum |= pE[i];
}
return CP_CT_IS_ZERO(accum); /*(accum == 0); */
}
__INLINE BNU_CHUNK_T* cpGFpElementSetChunk(BNU_CHUNK_T* pR, int nsR, BNU_CHUNK_T x)
{
return cpGFpElementCopyPadd(pR, nsR, &x, 1);
}
#define GFP_LT(a,b,size) (-1==cpGFpElementCmp((a),(b),(size)))
#define GFP_EQ(a,b,size) ( 0==cpGFpElementCmp((a),(b),(size)))
#define GFP_GT(a,b,size) ( 1==cpGFpElementCmp((a),(b),(size)))
#define GFP_IS_ZERO(a,size) cpGFpElementIsEquChunk((a),(size), 0)
#define GFP_IS_ONE(a,size) cpGFpElementIsEquChunk((a),(size), 1)
#define GFP_ZERO(a,size) cpGFpElementSetChunk((a),(size), 0)
#define GFP_ONE(a,size) cpGFpElementSetChunk((a),(size), 1)
#define GFP_IS_EVEN(a) (0==((a)[0]&1))
#define GFP_IS_ODD(a) (1==((a)[0]&1))
/* construct GF element */
__INLINE IppsGFpElement* cpGFpElementConstruct(IppsGFpElement* pR, BNU_CHUNK_T* pDataBufer, int ns)
{
GFPE_ID(pR) = idCtxGFPE;
GFPE_ROOM(pR) = ns;
GFPE_DATA(pR) = pDataBufer;
return pR;
}
/* size of GFp context, init and setup */
#define cpGFpGetSize OWNAPI(cpGFpGetSize)
int cpGFpGetSize(int feBitSize, int peBitSize, int numpe);
#define cpGFpInitGFp OWNAPI(cpGFpInitGFp)
IppStatus cpGFpInitGFp(int primeBitSize, IppsGFpState* pGF);
#define cpGFpSetGFp OWNAPI(cpGFpSetGFp)
IppStatus cpGFpSetGFp(const BNU_CHUNK_T* pPrime, int primeBitSize, const IppsGFpMethod* method, IppsGFpState* pGF);
/* operations */
#define cpGFpRand OWNAPI(cpGFpRand)
BNU_CHUNK_T* cpGFpRand(BNU_CHUNK_T* pR, gsModEngine* pGFE, IppBitSupplier rndFunc, void* pRndParam);
#define cpGFpSet OWNAPI(cpGFpSet)
BNU_CHUNK_T* cpGFpSet (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pDataA, int nsA, gsModEngine* pGFE);
#define cpGFpGet OWNAPI(cpGFpGet)
BNU_CHUNK_T* cpGFpGet (BNU_CHUNK_T* pDataA, int nsA, const BNU_CHUNK_T* pR, gsModEngine* pGFE);
#define cpGFpSetOctString OWNAPI(cpGFpSetOctString)
BNU_CHUNK_T* cpGFpSetOctString(BNU_CHUNK_T* pR, const Ipp8u* pStr, int strSize, gsModEngine* pGFE);
#define cpGFpGetOctString OWNAPI(cpGFpGetOctString)
Ipp8u* cpGFpGetOctString(Ipp8u* pStr, int strSize, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#define cpGFpNeg OWNAPI(cpGFpNeg)
BNU_CHUNK_T* cpGFpNeg (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#define cpGFpInv OWNAPI(cpGFpInv)
BNU_CHUNK_T* cpGFpInv (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#define cpGFpHalve OWNAPI(cpGFpHalve)
BNU_CHUNK_T* cpGFpHalve(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#define cpGFpAdd OWNAPI(cpGFpAdd)
BNU_CHUNK_T* cpGFpAdd (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsModEngine* pGFE);
#define cpGFpSub OWNAPI(cpGFpSub)
BNU_CHUNK_T* cpGFpSub (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsModEngine* pGFE);
#define cpGFpMul OWNAPI(cpGFpMul)
BNU_CHUNK_T* cpGFpMul (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsModEngine* pGFE);
#define cpGFpSqr OWNAPI(cpGFpSqr)
BNU_CHUNK_T* cpGFpSqr (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#define cpGFpExp OWNAPI(cpGFpExp)
BNU_CHUNK_T* cpGFpExp (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pE, int nsE, gsModEngine* pGFE);
#define cpGFpSqrt OWNAPI(cpGFpSqrt)
int cpGFpSqrt(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsModEngine* pGFE);
#endif /* _PCP_GFP_H_ */
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